.005" to .015" with a 24 Diametral Pitch Gear - New Fine Pitch Specification.005" to .025" with a 20 Diametral Pitch Gear - was .000" to .015" with a 20 Diametral Pitch Gear.005" to .050" with a 12 Diametral Pitch Gear - was .000" to .040" with a 12 Diametral Pitch Gear.005" to .065" with a 8 Diametral Pitch Gear - was .000" to .055" with a 8 Diametral Pitch Gear

H1500/1600 Series vs RH1500/1600 Series Improved Specifications:

Duty Cycle: 50% ± 15% was 50% ± 20%

Target Air Gap: RH1500/1600

.005" to .020" with a 24 Diametral Pitch Gear - New Fine Pitch Specification.005" to .030" with a 20 Diametral Pitch Gear - was .000" to .020" with a 20 Diametral Pitch Gear.005" to .050" with a 12 Diametral Pitch Gear - was .000" to .045" with a 12 Diametral Pitch Gear.005" to .075" with a 8 Diametral Pitch Gear - was .000" to .060" with a 8 Diametral Pitch Gear